Eggshell crusher and pulverizer



Oct 27, l

AE. W. HIRSCHMAN EGGSHELL CRUSHER AND PULVERZERl Filed Julyl 3, 1924 2 Sheets-Sheet l attendu! L E. W. HIRSCHMAN EGGSHELL CRUSHER AND PULVERIZER oct. 27, 192

Fiied July s, 1924 2 Sheets-Sheet 2 noentoz Lax] Patented Oct. 27, 19.25.. l

EDWARD W. HIRSCBMAN,OF FINDLA'Y, OHIO.

EGGSHELL CRUSHER AND PULVEBIZER.

Application illed July 3,

To all whom it may concern:

Be it known that I, EDWARD W. -Hmsoiat- MAN, a citizen of the UnitedStates, residing' at Findlay, Ohio, in the county of Hancoc and State of Ohio, have invented certain new and useful Improvements in E gshell Crushers and Pulverizers, of which t e following is` a speci-lication.

This invention relates to a pulverizer and crusher of novel desi n and construction intended for househol to a device for pulverizing and crushing egg shells preparatory to the mixing of same with salt for incorporating in food stuffs.

That the American diet is, deficient in lime contents is wellj recognized and it has been proposed to remedy this defect by mixing egg shells with salt and usin the mixture in a salt cellar for the value of t e lime contents of the shell. An obstacle to the practicable adoption of this su gestion is the lack of a suitable apparatus or crushing and pulverizing the egg duced to a the manner prescribed and it is one of the special objects of the present invention to eliminate this diiiiculty b providingan inexpensive, hand-operate and serviceable apparatus by which the crushi land ulverizing of egg shells can be quie ly an efficiently accomplished.

Other objects and advantages of. the invention may be Vapparent from the following description, taken in connection with the accompany drawings illustrating the practical embodiment of the invention, a'nd wherein: a

Figure 1 is an end view, fpartly in elevation and partly in section, o `one type ofv device contemplated by the invention.

Figure 2 a sectional view thereof taken on line 2--2A of Figure 1.

of one of the combined end disks an overs of the device.

Figure 4 is a view of another type of device contemplated bythe invention.

Figure 5 is a Asectional viewthereof taken on line 5-5 of Figure 4.`

Figure 6 is a detailed view, in perspective,

of the pulverizing-disk used with the device shown in Figure 4, and:

use and particularly shellsso that they may be r ene powder suitable for use 1n i 1s Figure 3 is a detailed view, in persdpective, A

1924. Serial No. 724,099.

Figure 7 is a sectional view of a further variation in the construction and design of the invention, .the device being viewed from there'a-n l n As will beffa parent from Figures. 1 to 3 inclusive, .the evice may consist of a'cylindrical housing 10 having end-covers 11 attached to provide a crushing chamber Wherein are two revolvin hammers 12 which operate on opposite sides of va sin le breakdown bar 13. The inlet 14 to t e crushing chamber is at the top .of the housing and is provided with a slide closure 15. The entire device ma be fastened to a support by means of a c amp at the bottom of the housing and consisting of a thumb screw 16 adjustable with respect to the clamp jaw 17. The end-covers 11, as well as the break-down bar 13, are fastened to the housing in any' suitable manner so as to be readily remov- 'able for disassembling the device or for replacement of the parts.

The hammers l12 are mounted on the square portion of ashaft 18 and revolve withthe shaft, being normally pressed apart and 4forced against pulverizmg disks 19 by,

means of an expanding spring 20 encirclin the 'shaft between the hammers. Each en cover 11 caries one of the two ulverizing disks 19; the. disk and cover being in one piece, as shown in Figure 3, and the face of each disk, which is-of smaller diameter than the cover so as to extend within the crushiwheel but are set at an angle, preferably 30 degrees, inclined in the directlon of the pulverizing disk against which the hammer ressed.

he purpose and object of having the blades inclined is to obtain a shearing effect as each blade moves past a groove of the disk. That is to say, as the blades pass the grooves or corrugations, they strike them at an angle and cut like a pair of scissors.

The shait 18, on which4 the hammers are in suitable beari 23 of the endl-covers, and the entire assemb y of hammers 12, spring fmounted, has its ends rounded and supported ,A 20, and shaft 18, is revolved byla hand crank 24 which is screwed onto the threaded 'clined blades, are thereby ultimately propelled against the pulverizing disk, to be caught and held'by the grooves of the latter, and subsequently ground to powder or dust. The blades of the hammers thus serve to break up the shell during the lakmg operation and also co-o erate with the grooved disks in pulverzing t e Hakes. The operation is continued until the product is as tine as desired and it is thenpourd out of the inlet.

In Figures 4 to 6 in'clusive, is shown a modification of the invention wherein only a single pulverizing disk is required. This disk, indlcated at 26, is centered within the crushing chamber and is secured to the housin by means of suitable fasteners 27. Both sides of the disk are corrugated and present a series -of radially disposed ratchet-like projections28 upon which the flakes of the crushed egg shells areadapted to collect. A pair of hammers 29', corresponding to hammers 12 previously described, areprovided one on each side of thedisk and two break-down bars 30 are also used, there being one bar disposed adjacent the lower outside edge of each hammer a'nd secured to cover 3l by suitable fasteners4 32. A separate spring 33 is associated with each hammer, each spring being confined between a hammer and an end-'cover 31 .of the housin In all other respects, the device correspon s with the one previously described and the operation is the same. "i

Figure 7 illustrates a modification which combines the structural features of the two preceding designs and indicates how this may be accomplished to produce a machine of larger size and greater capacity.

Havlng thus described the invention, what I claim as new-and desire to protect by Letters Patent, is: What is claimed is: 1. An egg-shell Crusher andfpulverizer including a crushing chamber, crushing means therein including a pair of revolving hammers and a stationary break-down bar between which the shell is adapted to be broken up into flakes during revolution of the hammers, a pulverizing member for each hammer presenting a corrugated surface over which the blades of the hammers are adapted to move,. the corrugations of the member serving to catch and hold the lflakes mers against the said corru ated surfaces of the said pulverizing mem ers.

2. An egg-shell crusher and pulverizer comprising a cylindrical housing having end-covers presenting grooved surfaces, a break-down bar withm the housing, a pair of revolving hammers operating on opposite sides of the said bar, and elastic means normally holding the saidhammers apart and forcing them against the said grooved surfaces of the said end-covers.

3. An egg-shell crusher and pulverizer including a 4cylindrical housing having a peripheral inlet, removable end-covers closing opposite sides of the said housing and presenting grooved surfaces, a break-down bar within the housing,a pair of revolving hammers operating on opposite sides of the said bar, a shaft having its ends journaled in the y said end-covers and having the said hammers mounted thereon to 'turn therewith, a crank for turning the shaft, and elastic means .normally holding the said hammers apart and pressed against the said grooved surfaces of the end-covers.

4. An egg-shell crusher and pulverizer including a' cylindrical housing with an outlet at the top and a 4clamp integral with the botfJ tom, removable endcovers closing opposite sides of the housing and presenting grooved surfaces, a shaft having its endsl Journaled in the said end-covers and having the portion between its ends squared, a break-down bar within the housing, a pair of hammers mounted on the squared portion of the shaft and operating on opposite sides of the said bar, means for normally forcing the said hammers against the grooved surfaces of the d direction of the grooved surfaces against which pressed.

6. An egg shell crusher and pulverizer comprising a cylindrical crushing chamber, a hammer revolubly mounted within the said chamber and presenting radially disposed bla-des, a stationary bar extending horizontally of the. said chamber in parallelism to theside walls thereof and 'positioned 13 immediately adjacent to one side of the said hammer force-o eration with the blades of the latter in breaking the shell into flakes, and a stationary disk adjacent to the opposite side of the hammer and presentin corrugated surfaces for co-operation wit the sides of the blades in pulverizin the flakes, the blades of the said hammer aving sur- Iand to obtain a shearin faces inclined in the direction of the pulverizing disk for the dual purpose of conducting the flakes to thegrooves of the said disk eect as each blade moves past a groove o the disk.

In testimony whereof I aix my signature.

EDWARD W. HIRSCHMAN. 

